EC2 Purchasing Options
Optimize your cloud spend by matching your workload characteristics to the right AWS pricing model.
01. The Decision Inputs
Predictability
Is your traffic steady, spikey, or completely unpredictable?
Duration
Do you need the server for minutes, months, or 3+ years?
Flexibility
Can you switch instance families or regions mid-term?
Budget
Are you prioritizing lowest cost or zero commitment?
02. The Savings Spectrum
Note: Spot instances offer the highest discount but can be reclaimed by AWS at any time.
On-Demand
Highest FlexibilityPay for compute capacity by the second. No long-term commitments. Best for short-term, irregular workloads.
Spot Instances
Deepest DiscountSpare AWS capacity at up to 90% off. AWS can terminate these with a 2-minute warning. Best for stateless, fault-tolerant jobs.
Reserved Instances (RI)
1 or 3 Year Term
Standard: Highest discount, fixed attributes.
Convertible: Change instance family/type mid-term.
Savings Plans
Modern StandardCommit to a consistent amount of usage (e.g., $10/hour). Automatically applies across EC2, Fargate, and Lambda.